SecuXabber is a secure Jabber-client for Android that uses strong, asymmetric encryption on top of the XMPP protocol. A key pair is generated on application start-up. Users can send their public key to other SecuXabber users via Bluetooth. This face-to-face check ensures the veracity of the public key. After the keys have been imported by both users, all communication between them is encrypted using strong 4096 bit encryption. It supports all relevant XMPP features, works with multiple accounts, is highly customizable, and has many other useful features.

Quak is a simple Jabber component (framework).
It connects to a Jabber server as a component and acts like a normal bot.
You can add plugins to make the bot react to several events (some simple
plugins are included).

jj is a simple FIFO and filesystem based Jabber/XMPP client. jj is inspired by the ii IRC client. jj is more tool than traditional instant messanger client. It can be easily extended with normal Unix tools. It is perfect for bots and notifications. Interaction with jj is done by writing and reading files from the server directory that jj creates.

Salut à Toi (or SàT: "Hi to You") is an XMPP/Jabber client with multi-frontends. You can use it on a desktop (Wix), with a console interface (Primitivus), as a command-line tool (jp), or on the Web (Libervia). A plugin architecture is used to make it modular. With SàT, you can perform all the expected XMPP functions (instant messaging, multi-user chat, file transfert, etc.), but you can also use your email client (MUA) to read and send your XMPP messages, play games, do microblogging, pipe Unix command results, make scripts, etc.

Poezio is a console-based client for XMPP, the protocol on which the Jabber IM network is built. Its goal is to let you connect to the network very easily (without having to create an account) and join various chatrooms immediately. It tries to look like the most famous IRC clients (such as weechat and irssi). Many commands are identical and you won't be lost if you already know these clients. Configuration can be done in a configuration file or directly from the client. It embodies the light, fast, geeky, and anonymous spirit of IRC while using a new, powerful, standard, and open protocol.

Scopserv Communicator is an audio/video Internet phone and instant messenger that supports some of the most popular VoIP and instant messaging protocols such as SIP, Jabber (XMPP), AIM/ICQ, MSN, Yahoo! Messenger, and a whole lot of other useful features. ScopServ Communicator is based on the SIP Communicator softphone.